Make vuex state non-persistent

Description / Overview

Currently the vuex state persists over a page-reload. This is no longer wanted / needed as it brings more issues than benefits.

Use cases

When a user presses F5 or reloads the page, the vuex state is reset to the initial state. Therefore the user can reset the application more easily without the need of a dedicated function to reset the store when an error happens.

Feature checklist

• Remove vuex's persited state
• Remove the vue-xpersitedstate dependency from yarn.

(Make sure these are completed before closing the issue, with a link to the relevant commit.)